A spatial analysis of lime resources and their potential for improving soil magnesium concentrations and pH in grassland areas of England and Wales.

Sci Rep · 2021 · PMC8516990 · PMID 34650109

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a clear trendno p-value reported

Figure 3 shows a clear trend in decreasing production of agricultural liming material over the last 40 years.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.